Properties of a generalized class of weights satisfying reverse Hölder's inequality
Summary: In this paper, we will prove some fundamental properties of the discrete power mean operator \(\mathcal{M}_p u(n)= (1/n\sum_{k=1}^n u^p (k))^{1 / p}\), for \(n\in\mathbb{I}\subseteq \mathbb{Z}_+,\) of order \(p\), where \(u\) is a nonnegative discrete weight defined on \(\mathbb{I}\subseteq \mathbb{Z}_+\) the set of the nonnegative integers. We also establish some lower and upper bounds of the composition of different operators with different powers. Next, we will study the structure of the generalized discrete class \(\mathcal{B}_p^q(B)\) of weights that satisfy the reverse Hölder inequality \(\mathcal{M}_q u\leq B\mathcal{M}_pu\), for positive real numbers \(p\), \(q\), and \(B\) such that \(0<p<q\) and \(B>1\). For applications, we will prove some self-improving properties of weights from \(\mathcal{B}_p^q(B)\) and derive the self improving properties of the discrete Gehring weights as a special case. The paper ends by a conjecture with an illustrative sharp example.
scientific article; zbMATH DE number 7341747
scientific article